package com.itheima.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.util.Date;
import java.util.Map;

public class JwtUtils {

    private static String signKey="SVRIRULNQQ==";
    private static Long expire=4300000L;

    /**
     * 生成JWT令牌
     */

    public static String generateJwt(Map<String, Object> claims){
        String jwt= Jwts.builder()
                .addClaims(claims)
                .signWith(SignatureAlgorithm.HS256,signKey)
                .setExpiration(new Date(System.currentTimeMillis()+expire))
                .compact();
        return jwt;
    }


    /**
     * 解析jwt令牌
     */
    public static Claims parseJWT(String jwt){
        Claims claims=Jwts.parser()
                .setSigningKey(signKey)
                .parseClaimsJws(jwt)
                .getBody();
        return claims;
    }

    /**
     * 令牌效验
     * @param token
     * @return
     */
    public static boolean verfiy(String token){
        try {
            parseJWT(token);
            return true;
        } catch (Exception e) {

        }
        return false;
    }

}
